When 2 electric charges are place close to each other they experience a force between them. This force may be repulsive or attractive depending on the type of charges involved.
The magnitude of this force depend on the quantity of individual charges and the distance between them.
The force is defined by the Coulomb's law states that: The magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them.
The formula for calculating the force between 2 electric charges is ;
F = (kq₁q₂)/d²
Where k is the proportionality constant known as Coulomb's constant,
q₁ and q₂ are the charges and
d is the distance between q₁ and q₂.
Answer:
C
Explanation:
I did the test kinda sorta and I got this.
A car impacting another car head on will double the force of impact
Answer:
The given statement is True.
Explanation:
A car impacting another car head on will double the force of impact - it is true.
The force of impact will be considered as double when a car is impacting another car head.
This situation is a good example of the law of conservation of momentum according to which the momentum which is present there in a system is always constant unless an external force is applied to it.
A head-on car collision does not double the impact force. Instead the changes in momentum among the two cars are equal and opposite and the total momentum remains constant. Safety features like airbags and seatbelts help to reduce the impact force by increasing the time over which it is applied.
Explanation:The question refers to the physics concept of momentum and force during a collision, particularly a head-on crash between two cars. Momentum change represented by ΔP₁ and ΔP₂ in cars 1 and 2 respectively is determined by the product of the force exerted and duration of the collision in each car. From Newton's third law, this force and change in momentum are proportionate and opposite among the two vehicles, hence ΔP₁ + ΔP₂ = 0. This implies the total momentum of the system – cars 1 and 2, before and after the collision, remains constant.
During a collision, safety mechanisms like airbags and seatbelts influence the net force and momentum. These devices extend the time the force acts on (At) reducing the actual force (Fnet) on the car and its occupants while conserving the total change in momentum (Δp).
Therefore it would be incorrect to say that a car impacting another head-on doubles the force of impact. The changes in momentum are equal opposite and the total momentum remains constant if no external forces are involved.
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if an object looks blue , it reflects_____ light
blue
Because, That object absorbs all colors light waves but does not absorbs Blue. So The blue light is reflected because it is not absorbed.
If a boy (m = 25 kg) at rest on skates is pushed by another boy who exerts a force of 500 N on him and if the first boy's final velocity is 20 m/s, what was the contact time?
Answer:
1 second
Explanation:
The impulse exerted on the boy is equal to its change of momentum:
[tex]I = \Delta p\\F \Delta t = m \Delta v[/tex]
where
F = 500 N is the push on the boy
[tex]\Delta t[/tex] is the contact time
m = 25 kg is the mass of the boy
[tex]\Delta v = 20 m/s[/tex] is the change in velocity of the boy
Solving the formula for the contact time, we find
[tex]\Delta t=\frac{m\Delta v}{F}=\frac{(25 kg)(20 m/s)}{500 N}=1 s[/tex]
Which of the following experiments or phenomena provided evidence for the particle nature of light?
Interference patterns observed during the double slit experiment.
Expulsion of electrons with varying frequencies of light observed in the photoelectron effect.
Polarization of light
The observed bending of light thought a prism and resulting spectrum.
Expulsion of electrons with varying frequencies of light observed in the photoelectron effect.
Explanation;The photoelectric effect supports a particle theory of light in that it behaves like an elastic collision between two particles, the photon of light and the electron of the metal.Albert Einstein observed the photoelectric effect in which ultraviolet light forces a surface to release electrons when the light hits. He explained the reaction by defining light as a stream of photons, or energy packets.Answer:
Expulsion of electrons with varying frequencies of light observed in the photoelectron effect.
Explanation:
Air pressure is caused by the density of gas molecules in the air. Please select the best answer from the choices provided T F
Answer: The given statement is true.
Explanation:
Density is defined as mass per unit volume.
Mathematically, Density = [tex]\frac{mass}{volume}[/tex]
So, when more is the density of air molecules then it means there will be more mass per unit volume. This will lead to more number of collisions between the molecules. Hence, more will be the air pressure.
Thus, we can conclude that the statement air pressure is caused by the density of gas molecules in the air, is true.
Answer:
TRUE!
Explanation:
:)
Please help- award 30 points
Brad and Lee are cycling in opposite directions. Brad is cycling at 24mph and Lee is cycling at 33mph
Why does it seem to Brad that Lee is travelling faster than he actually is?
Brad perceives Lee as moving faster because their speeds add up when they're cycling in opposite directions. This combined relative speed is 57 mph, which is much faster than Lee's actual speed of 33 mph.
Explanation:When both Brad and Lee are cycling in opposite directions, the speed at which they appear to be moving away from each other is the sum of their individual speeds. Since Brad is cycling at 24 mph and Lee is cycling at 33 mph, to Brad it would appear that Lee is moving away at a speed of 24 mph + 33 mph = 57 mph, much faster than Lee's actual speed. This is because when two objects are moving in opposite directions, their speeds relative to each other are additive. Therefore, it seems to Brad that Lee is travelling faster than his actual speed of 33 mph.
15. A girl pushes a box that has a mass of 85 kg up an incline. If the giri exerts a force
of 200 N along the incline what is the mechanical advantage of the incline?
M.A = 4.25
Explanation;Mechanical advantage is the ratio of the force required to do something in comparison to the actual force required using a simple machine.
It is the ratio of output force to the input force.
M.A = Output Force/ Input Force
Out put force 85 Kg = 850 N
Input force = 200 N
Therefore;
M.A = 850 N/200 N
= 4.25
a 60 kg gila monster on a merry go round is travelling in a circle with a radius of 3 m at a speed of 2m/s
What is acceleration and net force and compare this with monster weight
Apply the equation for objects that move in circles:
[tex]a = \dfrac{v^2}{r}[/tex],
where
[tex]a[/tex] is the acceleration of the object, [tex]v[/tex] is the tangential speed of the object, and[tex]r[/tex] is the radius of the circular path.For this monster:
[tex]a[/tex] is to be found, [tex]v = 2\;m\cdot s^{-1}[/tex], and[tex]r = 3\;\text{m}[/tex].[tex]\displaystyle a = \frac{({2\;\text{m}\cdot\text{s}^{-1}})^{2}}{3\;\text{m}} = \frac{2^2}{3}\;\text{m}\cdot\text{s}^{-2}= 1.3\;\text{m}\cdot\text{s}^{-2}[/tex].
By Newton's Second Law,
[tex]\Sigma F = m\cdot a[/tex],
where
[tex]\Sigma F[/tex] is the net force on an object,[tex]m[/tex] is the mass of the object, and[tex]a[/tex] is the acceleration of the object.[tex]\Sigma F[/tex] is to be found,[tex]m = 60\;\text{kg}[/tex] for this monster, and[tex]a = 1.33333\;\text{m}\cdot\text{s}^{-2}[/tex] from previous calculations.[tex]\Sigma F = m\cdot a = 60\;\text{kg} \times 1.33333\;\text{m}\cdot\text{s}^{-2} = 80\;\text{N}[/tex].
Weight of an object near the surface of the earth:
[tex]W = m\cdot g[/tex],
where
[tex]m[/tex] is the mass of the object, and[tex]g[/tex] is the gravitational acceleration "constant" (a.k.a. gravitational field strength.) [tex]g \approx 9.81\;\text{N}\cdot\text{kg}^{-1}[/tex] near the surface of the earth.[tex]W = 60\;\text{kg} \times 9.81\;\text{N}\cdot\text{kg}^{-1}=5.9\times 10^{2} \;\text{N}[/tex].
think about something that has happened to you physically—a fall, a jump, an accident, or something you may have done hundreds of times in your favorite sport. Analyze the action and describe it in terms of Newton’s laws. Identify the initial conditions and the forces involved.
My best hobby is driving. Driving has something to do with Newton's first law of motion, which states that an object will continue to be in its state of rest or in uniform motion in a straight line unless it is acted upon by an external force. This law means that an object will continue to be in motion in the same direction unless it is acted upon by a force. Newton's first law of motion is also called the law of inertia.
I usually experience the law of inertia when I am driving my car.
Every morning, for me to move the car from its state of rest to a state of uniform motion, I have to switch on the ignition, which represent an unbalanced force that move the car out of its states of rest. When I am driving, the car continue in motion and in the same direction, unless I apply the brake. The application of the brake is an example of applying an unbalanced force to stop a body in motion.
_______ measures an object's change in position per unit time.
A) Distance
B)Force
C) Speed
I believe your answer should be C. Speed.
Answer:
C) Speed
Why?
Think of it like when youre on the road. Your speed is determined by miles per hour. Thats your speed. Hope this helps! Let me know if you don't understand.
Which provides the best analogy for an electron in an atomic orbital?
A. a bee moving from flower to flower in a garden
B.a bird resting on a tree branch
C.an ant crawling on the surface of a leaf
D.a bee trying to escape from a closed jar
In an atom the electrons will occupy orbitals so that their energy is as small as possible. That is why the orbitals are ordered based on their energy level in an increasing order, which is associated with a particular range of energy based on its distance from the atom nucleus.
In this sense, an electron "jumps" from one level to another in the atom in the same way a bee tries to escape from a closed jar.
A conductor wire with length of 0.20 m and weight of 1.47 N is oriented perpendicularly to a magnetic field. If the current of 1.75A flows to the north, the net force on the wire is measured using a balance and found to be zero. What is the magnitude and direction of the magnetic field?
1. Magnitude: 4.4 T
The net force on the wire is zero, therefore the magnetic force must be equal to the weight of the wire:
[tex]F_M = W = 1.47 N[/tex]
Where the magnetic force is
[tex]F_M = IBL sin \theta[/tex]
where
I = 1.75 A is the current
B is the magnetic field
L = 0.20 m is the length of the wire
[tex]\theta=90^{\circ}[/tex] is the angle between the direction of L and B
Solving the formula for B, we find the magnitude of the magnetic field:
[tex]B=\frac{F_M}{ILsin \theta}=\frac{1.47 N}{(1.75 A)(0.20 m)(sin 90^{\circ})}=4.2 T[/tex]
2. Direction: westward
The direction is given by the right's hand rule. We know that:
- thumb --> magnetic force (upward)
- index finger --> current (north)
- middle finger --> direction of magnetic field: so, it must be westward.
- middle
how does gravity affect the velocity of falling objects?
please help asap I need this question answered by tommorow
When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity, and velocity, in turn, is a measure of the speed and direction of motion. Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls
Gravity causes objects to accelerate at [tex]9.8 m/s^2[/tex] towards the Earth, meaning their velocity increases uniformly as they fall.
In the absence of other forces, such as air resistance, all objects will experience the same acceleration of [tex]9.8m/s^2[/tex] and thus their velocity will increase at the same rate as they fall.
To understand this, consider Galileo's discovery that, regardless of their mass, objects will fall at the same rate when only gravity is acting upon them. However, air resistance plays a crucial role in real-world scenarios, affecting lighter and more aerodynamically inefficient objects more significantly. For instance, a golf ball falls faster than a flat sheet of paper due to lower air resistance.Mathematically, the velocity of an object in free-fall can be calculated using the formula [tex]v = g t[/tex] , where [tex]v[/tex] is velocity, [tex]g[/tex] is the acceleration due to gravity, and [tex]t[/tex] is the time passed. The position of the falling object can also be determined with [tex]s = 1/2 g t^2[/tex] , where [tex]s[/tex] is the displacement.Experimental evidence supporting this includes the famous 1971 Apollo 15 moon landing experiment where a feather and hammer were dropped simultaneously in the moon's vacuum, showing they fell at the same rate.Object A and B are 10m apart. Which of the following will cause the greatest increase in gravitational force between the objects?
A. Increase the mass of object A.
B. Increase the mass of object B.
C. Increase the distance between objects A and B.
D. Increase the mass of both object A and object B.
D. Increase the mass of both object A and object B
If you increase the mass of object-A (choice-A) OR object-B (choice-B), the gravitational force between them will increase. So naturally, if you increase the mass of both object A and object B, you'll get both increases. (D)
Increasing the distance between the objects (choice-C) will DEcrease the gravitational force between them. This is a big part of the reason why we never feel especially attracted toward Jupiter.
What is the difference between mass and weight? In at least three sentences, explain the difference and give an example.
Mass and weight are different. Mass is the measurement of how much matter an object has, while weight deals with the pull of gravity. For example, an astronaut floating in space is weightless, due to the limited influence of gravity. But he will still have mass, that is because mass and weight are different :)
Mass is entirely a property of the object. So the conditions and environment surrounding the object have no effect on it, and it doesn't change.
Weight is a measurement of the interaction between the object and its environment, so its weight changes as it moves from place to place.
Example:
A standard brass cylinder in a laboratory set of calibrated masses is marked "1 kilogram".
When you weigh it on Earth, the scale says "9.8 Newtons" or "2.2 pounds".
If you take the set of calibrated masses to the Moon with you, and weigh the same "1 kilogram" piece, it weighs "1.62 Newtons" or "5.8 ounces" up there.
HELP!!
When a coil of wire is moved through a magnetic field, _____.
A. the voltage is first raised and then lowered
B. a solenoid is created
C. mechanical energy is transformed into electrical energy
D. electrical energy is transformed into mechanical energy
Answer:
Faradays Law
Explanation:
Any change in the magnetic environment of a coil of wire will cause a voltage (emf) to be "induced" in the coil. No matter how the change is produced, the voltage will be generated. The change could be produced by changing the magnetic field strength, moving a magnet toward or away from the coil, moving the coil into or out of the magnetic field, rotating the coil relative to the magnet.
As a transverse wave travels through a rope from left to right, the parts of the rope _______.
In a transverse wave traveling through a rope, parts of the rope move perpendicular to the wave's direction, with oscillations being vertical or horizontal, corresponding to vertical or horizontal polarization.
Explanation:As a transverse wave travels through a rope from left to right, the parts of the rope move up and down or side to side, perpendicular to the direction of the wave travel. The motion of part of the rope depends on the orientation of the oscillations. If the oscillations of the transverse wave are in a vertical plane, they are described as vertically polarized, and correspondingly, if in a horizontal plane, they are horizontally polarized.
Considering the case of a vertically polarized wave, if a vertical slit is positioned in relation to the rope, it allows the passage of the wave.
However, the same vertical slit would block transverse waves that are horizontally polarized. This concept of polarization is important not only when studying waves in ropes but also for electromagnetic (EM) waves, where the direction of the electric field represents similar behavior to the disturbances seen in rope waves.
Therefore, when we think about the parts of a rope where a transverse wave is traveling from left to right, we focus on the unique movement of those parts of the rope in relation to the direction of energy transfer—illustrating the key behavior of transverse waves.
HELP me with this please !!!
The image produced by a plane mirror is because the incident rays coming from the real object (point W in the diagram) reach the mirror and are reflected following the law of Reflection. The prolongation of those reflected rays converge at a point that does not coincide with the actual position of the object. At that point the virtual image of the object is formed.
Then, the reflected divergent rays are captured by our eye converging on the retina (point Z in the diagram).
Now, it is important to note the image produced is virtual because it is a copy of the object that looks as if the object is behind the mirror and not in front of it or on the surface, but it is not really there.
In addition, the image formed is:
symmetrical, because apparently it is at the same distance from the mirror
the same size as the object.
upright, because it retains the same orientation as the object.
So, according to all these, the image will be produced in X
what will not affect strength of a electromagnet?
Making the nail longer does not affect the strength of the electromagnet unless more coil is added to it.
What is electromagnet?Electromagnet is a form of magnet which has a magnetic field that is produced by an electric current. Electromagnets usually consist of wire wound into a coil.
Therefore, Making the nail longer does not affect the strength of the electromagnet unless more coil is added to it.
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Making the nail longer does not affect the strength of the electromagnet unless more coil is added to it.
What is electromagnet?Electromagnet is a form of magnet which has a magnetic field that is produced by an electric current. Electromagnets usually consist of wire wound into a coil.
The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.
Electromagnets are widely used as components of other electrical devices, such as motors, generators, electromechanical solenoids, relays, loudspeakers, hard disks, MRI machines, scientific instruments
Therefore, Making the nail longer does not affect the strength of the electromagnet unless more coil is added to it.
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Which of the following is smaller than a single atom?
Proton
Molecule
Element
Solution
proton boisssssssssssssssssssssssssssssss
What is the definition for nebula
The definition for nebula is : A cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.
Nebulae "plural" are huge clouds of dust and gasses in outer space. Most of the gas is made up helium and also hydrogen. Nebulae are very big and can be be many light years away.
When an acrobat reaches the equilibrium position, the net force acting along the direction of motion is zero. Why does the acrobat swing past the equilibrium position
at equilibrium, velocity is at it's maximum. So it keeps going because an object in motion stays in motion.
Sort the characteristics of solids liquids and gases into the correct colums
Solids have molecules that move slowly and are close together and are very attracted to eachother.
Liquids have molecules that move freely and are slightly attracted to eachother.
Gases have molecules that move, but aren't attracted to eachother.
The characteristics of solids, liquids, and gases differ by density, shape, volume, and how sensitive they are to changes in temperature and pressure. Solids are dense with a definite shape, liquids have a definite volume but take the shape of their container, and gases have the lowest density and fill their containers completely.
Understanding the characteristics of the three common phases of matter—solids, liquids, and gases—is fundamental in chemistry. Here's how these states typically compare:
Density: Solids usually have the highest density, followed by liquids, and gases have the lowest density.
Shape: Solids have a definite shape, liquids take the shape of their container, and gases fill the entire volume of their container.
Volume: For a given mass, solids and liquids have a definite volume, while the volume of gases can change markedly with temperature and pressure.
Sensitivity to Temperature: Gases are most sensitive to changes in temperature, followed by liquids, with solids being the least sensitive.
Sensitivity to Pressure: Gases are also highly sensitive to changes in pressure, while the volumes of liquids and solids are relatively incompressible, meaning they are less affected by pressure changes.
The arrangement of atoms or molecules within these phases: In solids, atoms are tightly packed in a fixed arrangement; in liquids, they are close but can slide over each other; and in gases, they are far apart and move freely.
A transformer only works with which type of current?
split
direct
alternating
magnetic
Answer would be: alternating.There is no electrical connection between the two coils. These only work if alternating current is supplied to the main coil. If DC was supplied, there would be no flow of current in the minor coil.
Answer:
alternating
Explanation:
The transformer works on the principle of electromagnetic induction.
When a changing magnetic flux is linked with the coil, then an induced emf is produced.
When an alternating current is give to the primary coil, the magnetic flux linked with the coil changes, which linked to the secondary coil of the transformer and hence an induced emf is developed.
A ball is dropped from the roof of a building. If it takes 2.6s to reach the ground how tall is the building
To find the height of the building, we use the free-fall equation s = ut + ½ at² with the time of fall (2.6s), resulting in a height of approximately 33.18 meters.
To calculate the height of the building given that a ball is dropped and takes 2.6 seconds to reach the ground, we can use the equations of motion for an object in free fall. Assuming the initial velocity (u) is 0 m/s (since the ball is dropped) and acceleration (a) is due to gravity (g = 9.81 m/s²), the equation we use is:
s = ut + ½ at²
Where:
Plugging in the values, we have:
s = 0 m/s (2.6 s) + ½ (9.81 m/s²)(2.6 s)²
s = ½ (9.81 m/s²)(6.76 s²)
s = 4.905 m/s² × 6.76 s²
s = 33.1763 m
Therefore, the height of the building is approximately 33.18 meters.
Lindsay has placed on object to the left of the lens, indicated by the bold line to project its image onto a screen. What actions would provide a clear image that is larger?
A)Move the object and image to the left.B)Move the object and image to the right.C)Move the object to the left and the screen to the right.D)Move the object to the right and the screen to the left.
b.Move the object and image to the right.
To obtain a clear image that is larger, Lindsay should move the object to the left and the screen to the right. Option C is correct.
What is the lens?A lens is a clear object made of glass or plastic that can bend (refract) and focus light.
When an object is placed to the left of a converging lens, a real and inverted image is produced on the other side of the lens. The size and position of the image are determined by the distance between the object and the lens, as well as the distance between the lens and the image.
To obtain a larger image, move the object closer to the lens or move the screen further away from the lens.. Moving the object and image to the right would make the image smaller, and moving the object and image to the left would not necessarily make the image larger or clearer.
Therefore, option C) Move the object to the left and the screen to the right is the correct answer to obtain a clear image that is larger.
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Which is the best example of the law of conservation of energy
Water is a good example of the law of conservation because, water when not moving has potential energy, and when moving like for example tap water, it turns kinetic.
The best example of the law of conservation of energy is the rolling skateboard that slows down because its kinetic energy changes to heat. This illustrates that energy is not created or destroyed but simply changes forms.
The law of conservation of energy states that energy cannot be created or destroyed, but it can be transferred or transformed from one form to another.
Option A is incorrect because the energy of the basketball does not disappear when it stops bouncing. Instead, the kinetic energy of the basketball is transformed into other forms of energy, such as sound and heat, when it hits the ground.
Option C is incorrect because the energy of the book is not destroyed when it falls to the ground. Instead, the potential energy of the book is converted into kinetic energy as it falls, and then some of that kinetic energy is transformed into sound and heat when it hits the ground.
Option D is incorrect because the ramp does not create energy for the toy car. Instead, the ramp converts some of the potential energy of the toy car into kinetic energy as it moves down the ramp.
Therefore, the best example of the law of conservation of energy is option B, where some of the kinetic energy of the skateboard is transformed into heat as it slows down. This illustrates the principle that energy cannot be destroyed, but can be transformed from one form to another.
Complete Question - Which is the best example of the law of conservation of energy?
A) A basketball stops bouncing because its energy disappears.
B) A rolling skateboard slows down because some of its kinetic energy changes to heat.
C) A falling book hits the ground and all of its energy is destroyed.
D) A toy car gains speed as it moves down a ramp because the ramp creates energy.
what do sun spots allow us to know about the sun
sun spots allow us to know it hurts and its hot
Sunspots. Sunspots are areas that appear dark on the surface of the Sun. They appear dark because they are cooler than other parts of the Sun's surface. ... These magnetic fields are so strong that they keep some of the heat within the Sun from reaching the surface. you should be carfull of this it can cause the skin to look dirty
Suppose that two pith balls, each with a charge of 1 Coulomb, are hanging in the lab room, seperated by a distance of 1 meter, and applying a force on eachother. What will be the magnitude of the electrostatic force between them?
Using Coulomb's Law, the electrostatic force between two 1 Coulomb charges separated by 1 meter is calculated to be [tex]8.99 \times 10^9[/tex] Newtons. This significant repulsive force illustrates the power of electrostatic forces at even relatively large distances.
Calculating Electrostatic Force Between Two Charges
To determine the electrostatic force between two pith balls, each with a charge of 1 Coulomb, separated by a distance of 1 meter, we use Coulomb's Law. Coulomb's Law is given by the formula:
[tex]F = k \times (|q_1 \times q_2|) / r^2[/tex]
where:
F is the magnitude of the force between the chargesk is Coulomb's constant, approximately [tex]8.99 \times 10^9 N.m^2/C^2[/tex][tex]q_1[/tex] and [tex]q_2[/tex] are the charges (1 C each in this case)r is the distance between the charges (1 meter in this case)Substituting the given values:
[tex]F = 8.99 \times 10^9 N.m^2/C^2 \times (1C \times 1 C) / (1 m)^2[/tex]
This simplifies to:
[tex]F = 8.99 \times 10^9 N[/tex]
the speed at which an object falls and the acceleration at which it falls are always the same value
True or False
The statement can't possibly be true, simply because speed and acceleration are two different things. They can change separately.
Answer:
False
Explanation: